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Bomb Produced 14C Content in Tree Rings Grown at Different Latitudes

Published online by Cambridge University Press:  18 July 2016

Kai-Mei Dai  and
C Y Fan
Kai-Mei Dai
Affiliation:
Department of Physics, Nanjing University, Nanjing, China
C Y Fan
Affiliation:
Department of Physics, Nanjing University, Nanjing, China
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Abstract

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The 14C content in 1961–1967 rings of each of three spruce pines grown at (68° N, 130° W), (47° 30' N, 129° 16' E) and (27° 13' N, 100° 20' E) were measured. Δ14C values of the three specimens rise dramatically from a common level (∼250‰) in 1961 to their respective maxima, 964‰, 909‰, and 743‰ in 1964 and then fall to a common level ∼680‰ in 1967. The observed Δ14C increase comes most likely from the nuclear bomb test of the USSR at 75° N in 1961, although there were many other tests since the 1950s. The different effects at different latitudes reflect the atmospheric circulation patterns in the stratosphere and the transport of 14C nuclei from the stratosphere to the troposphere.

Type
III. The Carbon Cycle
Information
Radiocarbon , Volume 28 , Issue 2A , 1986 , pp. 346 - 349
Copyright
Copyright © The American Journal of Science 

References

Cain, W F and Suess, H E, 1976, Carbon 14 in tree rings: Jour Geophys Research, v 81, p 3688–3694.Google Scholar
Fairhall, A W and Young, J A, 1970, Radiocarbon in the environment: Adv in chemistry series, no. 93, p 401–418.CrossRefGoogle Scholar
Fan, C Y, Chen, T M, Yun, S X and Dai, K M, 1983, Radiocarbon activity variation in dated tree rings grown in Mackenzie Delta, in Stuiver, M and Kra, R S, eds, Internatl 14C conf, 11th, Proc: Radiocarbon, v 25, no. 2, p 205–212.Google Scholar
Feely, H W, Seitz, H, Lagomarsino, R J and Biscaye, P E, 1966, Transport and fallout of stratospheric radioactive debris: Tellus, v 18, p 316–328.Google Scholar
Lamb, H H, 1970, Volcanic dust in the atmosphere; with a chronology and assessment of its meteorological significance: Royal Soc [London] Philos Trans, v 266, p 425–533.Google Scholar
Nydal, R, 1966, Variation in 14C concentration in the atmosphere during the last several years: Tellus, v 18, p 272–279.Google Scholar
Povinec, P, 1983, Comparison of data on 14C variations with the 11-yr solar cycle as obtained by different groups, in Stuiver, M and Kra, R S, eds, Internatl 14C conf, 11th, Proc: Radiocarbon, v 25, no. 2, p 259–266.Google Scholar